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FAS2700 - Replacing the NVMEM battery.pdf

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FAS2700 - Replacing the NVMEM battery

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FAS2700 and AFF A220 systems

Replacing the NVMEM battery

The workflow diagram shows you the tasks involved in replacing the NVMEM battery.

Replacing the NVMEM battery

To replace an NVMEM battery in the system, you must remove the controller module from the system, open it, replace the

battery, and close and replace the controller module.

About this task

All other components in the system must be functioning properly; if not, you must contact technical support.

Steps

1. Shutting down the impaired controller on page 2

215-12721_2019-11_en-us November 2019 Copyright

Web: www.netapp.com • Feedback: doccomments@netapp.com

2. Opening the system on page 4

3. Replacing the NVMEM battery on page 6

4. Reinstalling the controller module on page 7

5. Running system-level diagnostics on page 8

6. Switching back aggregates in a two-node MetroCluster configuration on page 11

7. Completing the replacement process on page 12

Shutting down the impaired controller

You can shut down or take over the impaired controller using different procedures, depending on the storage system hardware

configuration.

Shutting down the node

To shut down the impaired node, you must determine the status of the node and, if necessary, take over the node so that the

healthy node continues to serve data from the impaired node storage.

Before you begin

• If you have a cluster with more than two nodes, it must be in quorum. If the cluster is not in quorum or a healthy node shows

false for eligibility and health, you must correct the issue before shutting down the impaired node.

ONTAP 9 System Administration Reference

Steps

1. If the impaired node is part of an HA pair, disable automatic giveback from the console of the healthy node:

storage failover modify -node local -auto-giveback false

2. Take the impaired node to the LOADER prompt:

If the impaired node is displaying... Then...

The LOADER prompt Go to the next step.

Waiting for giveback... Press Ctrl-C, and then respond y when prompted.

System prompt or password prompt

(enter system password)

Take over or halt the impaired node:

• For an HA pair, take over the impaired node from the healthy node:

storage failover takeover -ofnode impaired_node_name

When the impaired node shows Waiting for giveback..., press Ctrl-C, and then

respond y.

• For a stand-alone system:

system node halt impaired_node_name

3. If the system has only one controller module in the chassis, turn off the power supplies, and then unplug the impaired node's

power cords from the power source.

FAS2700 systems: Replacing the NVMEM battery

Shutting down a node in a two-node MetroCluster configuration

To shut down the impaired node, you must determine the status of the node and, if necessary, switch over the node so that the

healthy node continues to serve data from the impaired node storage.

About this task

You must leave the power supplies turned on at the end of this procedure to provide power to the healthy node.

Steps

Check the MetroCluster status to determine whether the impaired node has automatically switched over to the healthy node:

metrocluster show

Depending on whether an automatic switchover has occurred, proceed according to the following table:

If the impaired node... Then...

Has automatically switched over Proceed to the next step.

Has not automatically switched over Perform a planned switchover operation from the healthy node:

metrocluster switchover

Has not automatically switched over,

you attempted switchover with the

metrocluster switchover

command, and the switchover was

vetoed

Review the veto messages and, if possible, resolve the issue and try again. If you are unable to

resolve the issue, contact technical support.

3. Resynchronize the data aggregates by running the metrocluster heal -phase aggregates command from the

surviving cluster.

Example

controller_A_1::> metrocluster heal -phase aggregates

[Job 130] Job succeeded: Heal Aggregates is successful.

If the healing is vetoed, you have the option of reissuing the metrocluster heal command with the -override-vetoes

parameter. If you use this optional parameter, the system overrides any soft vetoes that prevent the healing operation.

4. Verify that the operation has been completed by using the metrocluster operation show command.

Example

controller_A_1::> metrocluster operation show

Operation: heal-aggregates

State: successful

Start Time: 7/25/2016 18:45:55

End Time: 7/25/2016 18:45:56

Errors: -

5. Check the state of the aggregates by using the storage aggregate show command.

Shutting down the impaired controller

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